Average of 12,24,36,48,60,72 is MCQ with Answer and Explanation

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Average of 12,24,36,48,60,72 is

A. 42

B. 40

C. 36

D. 45

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum=252. Average=42.

This question belongs to: Maths Average

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Question #1

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If average of 15 numbers is 40 and one number 50 is replaced by 30, new average?

A. 41

B. 38

C. 40

D. 39

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Correct Answer: Option D

Explanation:
Change -20, decrease 20/15≈1.33, new≈38.67 approx but use exact.

This question belongs to: Maths Average

Question #2

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The average weight of 20 boys is 60 kg. If one boy weighing 80 kg leaves, what is the average weight of the remaining boys?

A. 61 kg

B. 59 kg

C. 60 kg

D. 58.95 kg

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Correct Answer: Option D

Explanation:
Total weight = 20×60 = 1200 kg. Remaining weight = 1200−80 = 1120 kg. Average = 1120/19 = 58.95 kg.

This question belongs to: Maths Average

Question #3

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The average of 4 numbers is 20. If each number is increased by 5, what is the new average?

A. 20

B. 25

C. 30

D. 15

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Correct Answer: Option B

Explanation:
New average =20+5=25.

This question belongs to: Maths Average

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